Calcium deficiency symptoms are mainly judged according to the patient’s age, for example, children’s calcium deficiency will lead to rickets, which manifests itself as not easy to sleep, irritability, easy to wake up, sweating after sleep, early weight bearing can trigger X-shaped legs, O-shaped leg deformity, chicken chest, anorexia, partiality, delayed intellectual development, thinning hair, poor health, and easy to external sensations. Calcium deficiency in adolescents can be manifested as frequent leg weakness, cramps, fatigue, irritability, lack of concentration, easy allergies, growth retardation. Most of the calcium deficiency in young adults will be manifested as easy fatigue, frequent fatigue, calf cramps, back pain. Middle-aged and elderly people, the group is a good incidence of calcium deficiency of the population, and the symptoms are typical, most of the manifestations of the waist and back, heel pain, loose teeth, loss, spinal deformity caused by hunchback, height reduction, loss of appetite, constipation, dreamy, insomnia, irritability, easy to lead to pathologic bone fracture, in particular, the chest 12 is the most common.